Non-contact tonometry is a method used to measure the pressure inside the eye, known as intraocular pressure (IOP). This technique is important for detecting conditions like glaucoma, which can lead to vision loss if not treated. Unlike traditional tonometry, it does not require direct contact with the eye, making it more comfortable for patients. During the procedure, a puff of air is directed at the eye, and the device measures how the eye responds to this air pressure. The results help eye care professionals assess the health of the optic nerve and overall eye health, guiding further treatment if necessary.